This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | -4 |
| 4 | 8 |
| 5 | -11 |
| 6 | 1 |
| 7 | 14 |
| 8 | 1 |
| 9 | -50 |
| 10 | 58 |
| 11 | 1 |
| 12 | 1 |
| 13 | -54 |
| 14 | 1 |
| 15 | -28 |
| 16 | 311 |
| 17 | -340 |
| 18 | 1 |
| 19 | 75 |
| 20 | 1 |
| 21 | -81 |
| 22 | 345 |
| 23 | -44 |
| 24 | 1 |
| 25 | -1427 |
| 26 | 1531 |
| 27 | -52 |
| 28 | 496 |
| 29 | -1253 |
| 30 | 1 |
| 31 | 1343 |
| 32 | 1 |
| 33 | -2924 |
| 34 | 738 |
| 35 | -68 |
| 36 | 9444 |
| 37 | -10073 |
| 38 | 1 |
| 39 | -76 |
| 40 | 1028 |
| 41 | 3691 |
| 42 | 1 |
| 43 | -4691 |
| 44 | 1 |
| 45 | -6941 |
| 46 | 21295 |
| 47 | -92 |
| 48 | 1 |
| 49 | -55580 |
| 50 | 33034 |
| 51 | 28180 |
| 52 | 1752 |
| 53 | -11479 |
| 54 | 1 |
| 55 | -54063 |
| 56 | 42847 |
| 57 | 19437 |
| 58 | 2186 |
| 59 | -116 |
| 60 | 1 |
| 61 | -77934 |
| 62 | 1 |
| 63 | -124 |
| 64 | 238507 |
| 65 | -169032 |
| 66 | 85151 |
| 67 | -188859 |
| 68 | 1 |
| 69 | -25755 |
| 70 | 3198 |
| 71 | 432636 |
| 72 | 1 |
| 73 | -513328 |
| 74 | 1 |
| 75 | -148 |
| 76 | 157041 |
| 77 | -36005 |
| 78 | 711327 |
| 79 | -465347 |
| 80 | 1 |